Dynamic database that supports NetBIOS computer name
registration and name resolution in an environment where the dynamic TCP/IP
configuration of DHCP-enabled clients is dynamically configured for TCP/IP.

Centralized management of the NetBIOS computer name database and its
replication to other WINS servers.

Support for transparent browsing across routers for Windows
NT Server, Windows NT Workstation, Windows 95, and Windows for Workgroups
clients. to the WINS server. The WINS server returns the destination
computer's IP address to the original computer without the need for broadcast
traffic.

The second reason for using WINS is that it's dynamic. As computers attach to
and detach from the network, the WINS databases are updated automatically.
This means that you don't have to create a static LMHOST file that the
computers can read to determine IP addresses.